144967657 has 2 divisors, whose sum is σ = 144967658. Its totient is φ = 144967656.

The previous prime is 144967649. The next prime is 144967709. The reversal of 144967657 is 756769441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142468096 + 2499561 = 11936^2 + 1581^2 .

It is an emirp because it is prime and its reverse (756769441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144967657 - 2³ = 144967649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144967657.

It is not a weakly prime, because it can be changed into another prime (144967157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72483828 + 72483829.

It is an arithmetic number, because the mean of its divisors is an integer number (72483829).

Almost surely, 2^144967657 is an apocalyptic number.

It is an amenable number.

144967657 is a deficient number, since it is larger than the sum of its proper divisors (1).

144967657 is an equidigital number, since it uses as much as digits as its factorization.

144967657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 144967657 is about 12040.2515339174. The cubic root of 144967657 is about 525.3197230130.

The spelling of 144967657 in words is "one hundred forty-four million, nine hundred sixty-seven thousand, six hundred fifty-seven".